File:Bell telephone magazine (1922) (14756056195).jpg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file(2,332 × 1,556 pixels, file size: 684 KB, MIME type: image/jpeg)

Captions

Captions

Add a one-line explanation of what this file represents

Summary[edit]



Description
English:

Identifier: belltelephonemag4344amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
s? • What makes a material magnetic? • What are the best insulators? These are all old questions at BellLaboratories, and each has led to manyothers, including a fairly basic one: arerelays really the best way to switch elec-trical signals? The questions lead to exciting researchthat sometimes provides answers rela-tively easily, but often leads to no finalanswers. The continuing search for im-provements through understanding basicprocesses frequently develops the kind ofknowledge that contributes to manyfields of technology relevant to communi-cations. Some contributions seem far re-moved from the problem that startedthe work in the first place. H Communications is such a perva-sive and broad technology thatthere is almost no recognized field ofphysical science where a significant ad-vance is not directly applicable to some Below: laser studies. This field looks so promising that today many scientists and engineersat Bell Laboratories are spending all or most of their time in it.
Text Appearing After Image:
part of the communications art. Eventhe social and biological sciences oftenyield important contributions. The variety and scope of communica-tions technology explains why there areso many engineers and scientists from somany specialties at Bell Telephone Lab-oratories. And it explains why BellLaboratories supports selected researchprojects in several colleges and universi-ties. New ideas in a field of science cansuddenly change the economic relevanceof broad areas of technology and generatemany development projects of potentialutility to the Bell System. One of the better examples of how suchoutside research can evolve into a majoreffort is the current work on masers andlasers at Bell Laboratories. Dr. CharlesTownes, one of the important pioneers inmicrowave spectroscopy, began his workat Bell Laboratories. While at BTL, hedid extensive work in this then-emergingfield. His later work at Columbia Uni-versity eventually led to his conceptionof the maser, a device that amplifieselectric

Note About Images

Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.
Date
Source

https://www.flickr.com/photos/internetarchivebookimages/14756056195/

Author Internet Archive Book Images
Permission
(Reusing this file)
At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.
Volume
InfoField
43-44
Flickr tags
InfoField
Flickr posted date
InfoField
27 July 2014

Licensing[edit]

This image was taken from Flickr's The Commons. The uploading organization may have various reasons for determining that no known copyright restrictions exist, such as:
  1. The copyright is in the public domain because it has expired;
  2. The copyright was injected into the public domain for other reasons, such as failure to adhere to required formalities or conditions;
  3. The institution owns the copyright but is not interested in exercising control; or
  4. The institution has legal rights sufficient to authorize others to use the work without restrictions.

More information can be found at https://flickr.com/commons/usage/.


Please add additional copyright tags to this image if more specific information about copyright status can be determined. See Commons:Licensing for more information.
This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.

العربية  беларуская (тарашкевіца)  čeština  Deutsch  Ελληνικά  English  español  français  Bahasa Indonesia  italiano  日本語  한국어  македонски  Nederlands  português  русский  sicilianu  slovenščina  ไทย  Tiếng Việt  中文(简体)  中文(繁體)  +/−

Flag of the United States
Flag of the United States
This image was originally posted to Flickr by Internet Archive Book Images at https://flickr.com/photos/126377022@N07/14756056195. It was reviewed on 17 September 2015 by FlickreviewR and was confirmed to be licensed under the terms of the No known copyright restrictions.

17 September 2015

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current17:25, 17 September 2015Thumbnail for version as of 17:25, 17 September 20152,332 × 1,556 (684 KB) (talk | contribs)== {{int:filedesc}} == {{subst:chc}} {{information |description={{en|1=<br> '''Identifier''': belltelephonemag4344amerrich ([https://commons.wikimedia.org/w/index.php?title=Special%3ASearch&profile=default&fulltext=Search&search=insource%3A%2Fbelltelep...

There are no pages that use this file.